I assigned generations based on the Porter autosomal DNA participants first match to Living Porter Mother (control DNA participant) I am the DNA participant for George Calvert the Elder so I assigned generations matching my descent.

Charles Calvert born about 1661 died 1733 St Mary's county, Maryland, identified son of William Calvert and Elizabeth Stone, married first Mary Howson daughter of Robert and Sarah LNU Howson. Charles Calvert married second Barbara Kirk(e) daughter of Martin Kirk and Maria Van Swearingen sister of Joseph Van Swearingen, 3rd husband of Mary (Neale) Egerton, Adderton, niece of Charles Calvert by his sister Elizabeth (Calvert) Neale.

George Calvert first appears in records in 1688 Stafford county, Virginia records as a witness for Burr Harrison he appears to disappear from records around 1700 when it's believed he has passed away. We can deduce he was of adult age by 1688 appearing in legal records born at least by 1667/8. this George Calvert styled the Elder proven father of George and John Calvert of Stafford county, Virginia.